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Sintesis Natrium Silikat Menggunakan Silika dari Pasir Pantai Bengkalis 利用 Bengkalis 沙滩砂中的二氧化硅合成硅酸钠
Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.640
Yelmida ' Azis, Ida ' Zahrina, Anisa Mutamima, Cory Dian Alfarisi, Nurfatihayati
Sodium silicate (Na2SiO3) is a chemical industrial material that is widely used as a metal cleaner, adhesive, and as a filler in the detergent, soap and toothpaste industries. Sodium silicate can be synthesized from silica dioxide (SiO2), which can be obtained through an extraction process from materials containing silica such as sand, glass bottle waste or rice husks. In this research, the synthesis of Na2SiO3 was carried out using silica extracted from Bengkalis beach sand using the acid leaching method, with a 3M HCl solution. The results of X-ray fluorescence (XRF) analysis of Bengkalis Beach sand showed that the silica content reached 89.1%. This research aims to determine the effect of the molar ratio of the NaOH reactant to the extracted SiO2 (2:1, 3:1 and 4:1) on the Na2SiO3 produced. The synthesis of Na2SiO3 was carried out using the hydrothermal method at atmospheric pressure, by reacting a 4M NaOH solution with 10 g of silica from Bengkalis sand, by heating at 110oC for an hour and stirring at 600 rpm. A molar ratio of 2:1 is the best ratio which produces 9.427g of Na2SiO3. From analysis using Fourier Transform Infrared (FTIR) spectroscopy, the spectrum patterns obtained are suitable for compounds containing silanol (≡Si-OH) and siloxane (≡Si-O-Si≡) groups. The X-ray diffraction (XRD) pattern of the synthesized compound is in accordance with standard sodium silicate. The Na2SiO3 obtained has a crystal diameter of 44.8 nm with an agglomerate-shaped morpology.
硅酸钠(Na2SiO3)是一种化学工业材料,被广泛用作金属清洁剂、粘合剂以及洗涤剂、肥皂和牙膏行业的填料。硅酸钠可以从二氧化硅(SiO2)中合成,而二氧化硅可以从沙子、玻璃瓶废料或稻壳等含有二氧化硅的材料中通过提取工艺获得。本研究使用酸浸法,用 3M HCl 溶液从 Bengkalis 沙滩沙中提取二氧化硅,合成了 Na2SiO3。对 Bengkalis 海滩沙的 X 射线荧光 (XRF) 分析结果显示,二氧化硅含量达到 89.1%。本研究旨在确定 NaOH 反应物与提取的 SiO2 的摩尔比(2:1、3:1 和 4:1)对生成的 Na2SiO3 的影响。Na2SiO3 的合成采用水热法,在常压下,将 4M NaOH 溶液与 10 克 Bengkalis 砂中的二氧化硅反应,在 110 摄氏度下加热一小时,并以 600 转/分的速度搅拌。摩尔比为 2:1 的最佳比例可生成 9.427 克 Na2SiO3。通过傅立叶变换红外光谱(FTIR)分析,所获得的光谱图适合于含有硅醇(≡Si-OH)和硅氧烷(≡Si-O-Si≡)基团的化合物。合成化合物的 X 射线衍射(XRD)图与标准硅酸钠相符。得到的 Na2SiO3 晶体直径为 44.8 纳米,形态呈团聚状。
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引用次数: 0
Aktivitas Tabir Surya Secara In-Vitro Ekstrak dan Fraksi Daun Kedondong (Spondias dulcis Sol. Ex G.Forst) Kedondong (Spondias dulcis Sol. Ex G.Forst) 叶提取物和馏分的体外防晒活性
Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.615
Rudiyansyah, Rizal Fathurrahman, Endah Sayekti
Excessive sun exposure to the skin can cause redness (erythema) and darkening of the skin (pigmentation). This effect can be prevented by using sunscreen. Kedondong leaves (Spondias dulcis Sol. Ex G. Forst) can act as a natural sunscreen because they contain secondary metabolite compounds with a conjugated double bond structure (chromophore), including phenolic and flavonoid compounds. The presence of conjugated double bonds in phenolic and flavonoid compounds is known to be able to absorb UV radiation thereby reducing its intensity on the skin. This study aims to determine the sunscreen activity of kedondong leaves based on the Sun Protection Factor (SPF), , the percentage of erythema transmission value (%Te), and the percentage of pigmentation transmission value (%Tp) and determine the secondary metabolite groups in kedondong leaf extracts and fractions. The research stages carried out were extraction of kedondong leaves by maceration, dechlorophyllation, followed by fractionation using n-hexane and dichloromethane, to obtain methanol extract, n-hexane fraction, dichloromethane fraction and methanol fraction. Then phytochemical tests were carried out on the extracts and fractions. Phytochemical tests showed that the secondary metabolite compounds in the methanol extract of kedondong leaves were alkaloids, phenolics, steroids and saponins. Furthermore, in the n-hexane fraction are steroids, the dichloromethane fraction is phenolic compounds, and the methanol fraction is alkaloid, phenolic and saponin compounds. Using a UV-Vis spectrophotometer at a wavelength of 200-400 nm, the sunscreen activity test showed that the dichloromethane fraction at a concentration of 120 mg/L was included in the extra protection category with an SPF value of 7,86±0,23; fast tanning with a %Te value of 15,99±0,83 and sunblock with a %Tp value of 32,72±1,09.
过度日晒会导致皮肤发红(红斑)和变黑(色素沉着)。使用防晒霜可以防止这种影响。Kedondong 叶片(Spondias dulcis Sol.众所周知,酚类和类黄酮化合物中的共轭双键能够吸收紫外线辐射,从而降低紫外线对皮肤的照射强度。本研究的目的是根据防晒系数(SPF)、红斑透射值百分比(%Te)和色素沉着透射值百分比(%Tp)确定葛根叶的防晒活性,并确定葛根叶提取物和馏分中的次生代谢物群。研究阶段包括浸渍提取葛藤叶、去叶绿素,然后用正己烷和二氯甲烷进行分馏,得到甲醇提取物、正己烷馏分、二氯甲烷馏分和甲醇馏分。然后对提取物和馏分进行了植物化学测试。植物化学测试表明,甲醇提取物中的次生代谢化合物包括生物碱、酚类、甾体和皂苷。此外,正己烷萃取物中含有类固醇,二氯甲烷萃取物中含有酚类化合物,甲醇萃取物中含有生物碱、酚类和皂苷化合物。使用波长为 200-400 纳米的紫外可见分光光度计进行的防晒活性测试表明,浓度为 120 毫克/升的二氯甲烷馏分属于额外保护类,SPF 值为 7.86±0.23;快速晒黑类,%Te 值为 15.99±0.83;防晒霜类,%Tp 值为 32.72±1.09。
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引用次数: 0
Pengaruh Perbandingan Massa Silikon/Silika terhadap Karbon pada Kinerja Anode Baterai Litium Ion dari Sekam Padi 硅/二氧化硅质量比较对碳的影响,对电池锂离子的性能影响来自稻壳
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.624
Achmad Rochliadi, Mohammad Alief Ramdhan, Aep Patah
This study aims to investigate the possible utilization of silica (SiO2) and silicon (Si) derived from rice husks as anode materials in lithium-ion batteries (LIBs). SiO2 and Si have impressive theoretical capacities of 1965 and 4200 mAh/g, respectively. However, their direct use as LIBs anodes faces challenges such as substantial volume changes during battery charging and discharging, as well as low electrical conductivity. Consequently, a common approach is to create nanostructures of SiO2 and Si, such as nanoparticles, nanowires, and nanotubes, and combine them with conductive matrices like carbon-based materials. In this study, the Si/SiO2/C composite was synthesized from rice husks, taking into account the mass ratio of Si/SiO2 to C. The process involved first separating SiO2 and C from rice husks and then synthesizing the composite using the ball mill method and activated molten salt aluminothermic reduction (AlCl3/NaCl). X-ray Diffraction (XRD) analysis confirmed the successful synthesis of the composite, as indicated by characteristic peaks of the constituent compounds. Scanning Electron Microscope (SEM) imaging showed non-uniform morphology with varying particle sizes. Tests results demonstrated that the Si/SiO2/C composite with a 3:1 ratio exhibited the most promising performance as a LIB anode, maintaining a high capacity of 280.48 mAh/g with a Coulombic Efficiency (CE) of 99% after 50 testing cycles. These findings suggest that silica and silicon compounds derived from rice husks hold great potential as efficient and durable anode materials for LIBs applications.
本研究旨在探讨稻壳中提取的二氧化硅(SiO2)和硅(Si)作为锂离子电池负极材料的可能性。SiO2和Si的理论容量分别为1965和4200 mAh/g。然而,它们作为锂离子电池阳极的直接使用面临着挑战,如电池充放电过程中体积的巨大变化,以及低导电性。因此,一种常见的方法是制造二氧化硅和硅的纳米结构,如纳米颗粒、纳米线和纳米管,并将它们与碳基材料等导电基质结合起来。本研究以稻壳为原料,考虑到Si/SiO2与C的质量比,合成了Si/SiO2/C复合材料。首先从稻壳中分离SiO2和C,然后采用球磨机法和活化熔盐铝热还原(AlCl3/NaCl)法制备复合材料。x射线衍射(XRD)分析证实了该复合材料的成功合成,由组成化合物的特征峰表明。扫描电镜(SEM)成像显示颗粒大小不一,形貌不均匀。测试结果表明,3:1比例的Si/SiO2/C复合材料作为锂离子电池阳极的性能最理想,在50次循环测试后,其容量保持在280.48 mAh/g,库仑效率(CE)达到99%。这些发现表明,从稻壳中提取的硅和硅化合物作为高效耐用的锂离子电池阳极材料具有很大的潜力。
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引用次数: 0
Komposit Zeolit-Polivinil Alkohol sebagai Adsorben untuk Menurunkan Kesadahan Air Tanah 能降低地下水耐久性的合成物聚合物
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.597
Anang Takwanto, None Yanty Maryanty, None Anugrah Windy Mustikarini, None Dina Wulan Sari, None Rizki Kurnia Juliansyah
Granular zeolite-polyvinyl alcohol (PVA) composites without glutralaldehyde and zeolite-PVA composites with the addition of glutaraldehyde were carried out in this study and used as adsorbents. This study aims to reduce groundwater hardness, determine the optimum zeolite size in composite mixtures, and determine the characterization of functional groups in composites. The stages of the research included: preparation and activation of zeolite with variations in zeolite sizes of 100, 60 and 45 mesh and variations in composition of zeolite-polyvinyl alcohol 1:1; 1:2; 2:1; 2:3 and 3:2. Furthermore, the preparation of PVA solution concentration of 9% and the formation of the composite. The results showed that the optimum size of the zeolite on the composite without glutaraldehyde was 60 mesh with a decrease in hardness of 68% while the ratio of the optimum zeolite-PVA composition was at a ratio of 3:2 with a decrease in hardness of 34 mg/L. The results of Langmuir and Freundlich isotherm analysis showed the presence of chemical bonds because the determination value (R2) of the adsorption isotherm was > 0.9. The results of functional group characterization showed OH- in the zeolite-PVA composite without glutaraldehyde at a wavelength of 3363.01 cm-1 while in the composite with glutaraldehyde at a wavelength of 3345.89 cm-1. The C=C functional group appeared at a wavelength of 1628.73 cm-1 for the zeolite-PVA composite without glutaraldehyde and 1635.86 cm-1 for the composite with glutaraldehyde. At a wavelength of 788.70 cm-1 and 794.40 cm-1, the Si-O symmetric stretching vibrations show in the zeolite structure.
研究了不含戊二醛的颗粒状沸石-聚乙烯醇(PVA)复合材料和添加戊二醛的沸石-聚乙烯醇复合材料作为吸附剂。本研究旨在降低地下水硬度,确定复合混合物中最佳沸石粒径,确定复合材料中官能团的表征。研究阶段包括:沸石的制备和活化,沸石尺寸为100、60和45目,沸石与聚乙烯醇的比例为1:1;1:2;2:1;2:3和3:2。进一步,制备了浓度为9%的PVA溶液并形成了复合材料。结果表明:不含戊二醛的复合材料上沸石的最佳粒径为60目,硬度降低68%;沸石与pva的最佳配比为3:2,硬度降低34 mg/L。Langmuir和Freundlich等温线分析结果表明,由于吸附等温线的测定值(R2)为>0.9. 官能团表征结果表明,不含戊二醛的沸石-聚乙烯醇复合材料的OH-波长为3363.01 cm-1,含戊二醛的沸石-聚乙烯醇复合材料的OH-波长为3345.89 cm-1。不含戊二醛的沸石-聚乙烯醇复合材料的C=C官能团出现在1628.73 cm-1波长处,含戊二醛的沸石-聚乙烯醇复合材料的C=C官能团出现在1635.86 cm-1波长处。在788.70 cm-1和794.40 cm-1波长处,Si-O对称伸缩振动出现在沸石结构中。
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引用次数: 0
Laju Reaksi Penghilangan Fosfat pada Limbah Cair Artifisial NPK Menggunakan Sistem Floating Treatment Wetlands 利用浮动处理湿地系统去除 NPK 人工液体废物中磷酸盐的反应速率
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.620
None Sugiarti, None Nurul Setiadewi, None Cynthia Henny, None Dewi Verawati, None Agus Waluyo
Floating Treatment Wetland (FTW) is a form of wetland that functions to remove waste such as Nitrogen (N element) and Phosphorus (Phosphorous/P element) waste by utilizing plant roots as pollutant absorbers. This study aims to examine the reaction rate of phosphate removal from synthetic P waste through FTW. The water plants used were water jasmine (Echinodorus palifolius) and banana (Helliconia psittaforum). Four FTW ponds are filled with synthetic P waste. The first pond is a control pond, while the second pond is filled with FTW without plants, and the third and fourth ponds are filled with each of the aquatic plants mentioned above. The study was conducted from July to mid-August 2019. Water samples were taken in four pools five times in the first week, three times in the second week and twice in the third to sixth weeks. The parameters measured are water temperature, pH, Oxidative Reductive Potential (ORP) and phosphate. The data analysis carried out was calculating the phosphate reaction rate for each measured sample. The rate of phosphate decreases in proportion to the decrease in phosphate concentration in the test pond. Aquatic plants have been proven to remove phosphate from synthetic waste by using it as a nutrient for plant growth.
浮式处理湿地(FTW)是利用植物根系作为污染物吸收剂,去除氮(N元素)、磷(磷/P元素)等废弃物的一种湿地形式。本研究的目的是考察利用超滤法对合成磷废渣进行除磷的反应速率。所使用的水生植物为茉莉(Echinodorus palifolius)和香蕉(Helliconia psittaforum)。四个FTW池装满了合成磷废物。第一个池塘为对照池,第二个池塘为不含植物的FTW,第三和第四个池塘分别为上述水生植物。该研究于2019年7月至8月中旬进行。在四个水池中取水样,第一周取5次,第二周取3次,第三至第六周取2次。测定的参数有水温、pH、氧化还原电位(ORP)和磷酸盐。所进行的数据分析是计算每个测量样品的磷酸盐反应速率。磷酸盐的速率随着试验池中磷酸盐浓度的降低而成比例地降低。水生植物已被证明可以从合成废物中去除磷酸盐,将其作为植物生长的营养物质。
{"title":"Laju Reaksi Penghilangan Fosfat pada Limbah Cair Artifisial NPK Menggunakan Sistem Floating Treatment Wetlands","authors":"None Sugiarti, None Nurul Setiadewi, None Cynthia Henny, None Dewi Verawati, None Agus Waluyo","doi":"10.25077/jrk.v14i2.620","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.620","url":null,"abstract":"Floating Treatment Wetland (FTW) is a form of wetland that functions to remove waste such as Nitrogen (N element) and Phosphorus (Phosphorous/P element) waste by utilizing plant roots as pollutant absorbers. This study aims to examine the reaction rate of phosphate removal from synthetic P waste through FTW. The water plants used were water jasmine (Echinodorus palifolius) and banana (Helliconia psittaforum). Four FTW ponds are filled with synthetic P waste. The first pond is a control pond, while the second pond is filled with FTW without plants, and the third and fourth ponds are filled with each of the aquatic plants mentioned above. The study was conducted from July to mid-August 2019. Water samples were taken in four pools five times in the first week, three times in the second week and twice in the third to sixth weeks. The parameters measured are water temperature, pH, Oxidative Reductive Potential (ORP) and phosphate. The data analysis carried out was calculating the phosphate reaction rate for each measured sample. The rate of phosphate decreases in proportion to the decrease in phosphate concentration in the test pond. Aquatic plants have been proven to remove phosphate from synthetic waste by using it as a nutrient for plant growth.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135993723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Mg-doped TiO2 Using a Hydrothermal Method as Photoanode on Bixin-Sensitized Solar Cell 水热法在bixin敏化太阳能电池上合成mg掺杂TiO2作为光阳极
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.622
None Winda Rahmalia, None Intan Syahbanu, None Nurlina, None Ayu Widya Sari, None Septiani
Titanium dioxide (TiO2) with magnesium (Mg) doping for dye-sensitized solar cell (DSSC) photoanode application has been synthesized. DSSC components used in this study were photosensitizer (bixin), electrolyte (), cathode (platinum), and photoanode (Mg-TiO2). This research aims to determine the characteristics of Mg-doped TiO2 photoanode with variations in dopant concentration based on the results of XRD and DR/UV-Vis analysis, as well as to determine the maximum efficiency conversion energy of DSSC using Mg-doped TiO2 and undoped TiO2 as photoanodes. The synthesis of TiO2 and Mg-TiO2 was carried out using the hydrothermal method with variations in the concentration of Mg dopant of 0, 0.5, 1, and 2% based on the molar ratio. The presenceof 2% of Mg in anatase TiO2 paste decreased the TiO2 band gap from 3.15 to 2.60 eV. Analysis results show that adding Mg dopant decreased the crystal size. Mg dopants on TiO2 could also form new energy levels, which reduced the band gap energy of TiO2. In addition, the increased concentration of Mg dopants also shifted the absorption capacity of TiO2 from the ultra-violet (UV) wavelengths region to the visible light area. The maximum energy conversion efficiency of the DSSCs with Mg-doped TiO2 photoanode of 0.5, 1, and 2% are 0.045; 0.070, and 0.172%, respectively, where these three efficiency values are higher than undoped TiO2 (0.017%). The results proved that the presence of Mg dopants on the TiO2 photoanode can increase the efficiency of DSSC.
合成了掺杂镁的二氧化钛(TiO2),用于染料敏化太阳能电池(DSSC)的光阳极。本研究使用的DSSC组分为光敏剂(bixin)、电解质()、阴极(铂)和光阳极(Mg-TiO2)。本研究旨在根据XRD和DR/UV-Vis分析结果,确定mg掺杂TiO2光阳极随掺杂浓度变化的特性,并确定以mg掺杂TiO2和未掺杂TiO2作为光阳极的DSSC的最大效率转换能。采用水热法制备了TiO2和Mg-TiO2, Mg掺杂浓度根据摩尔比分别为0、0.5、1和2%。在锐钛矿型TiO2膏体中加入2% Mg, TiO2带隙从3.15 eV减小到2.60 eV。分析结果表明,Mg掺杂剂的加入使晶体尺寸减小。Mg掺杂在TiO2上也能形成新的能级,使TiO2的带隙能降低。此外,Mg掺杂浓度的增加也使TiO2的吸收能力从紫外波长区转移到可见光区。掺杂mg - TiO2光阳极为0.5、1和2%时,DSSCs的最大能量转换效率分别为0.045;分别为0.070和0.172%,这三个效率值均高于未掺杂TiO2的0.017%。结果表明,在TiO2光阳极上添加Mg掺杂剂可以提高DSSC的效率。
{"title":"Synthesis of Mg-doped TiO2 Using a Hydrothermal Method as Photoanode on Bixin-Sensitized Solar Cell","authors":"None Winda Rahmalia, None Intan Syahbanu, None Nurlina, None Ayu Widya Sari, None Septiani","doi":"10.25077/jrk.v14i2.622","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.622","url":null,"abstract":"Titanium dioxide (TiO2) with magnesium (Mg) doping for dye-sensitized solar cell (DSSC) photoanode application has been synthesized. DSSC components used in this study were photosensitizer (bixin), electrolyte (), cathode (platinum), and photoanode (Mg-TiO2). This research aims to determine the characteristics of Mg-doped TiO2 photoanode with variations in dopant concentration based on the results of XRD and DR/UV-Vis analysis, as well as to determine the maximum efficiency conversion energy of DSSC using Mg-doped TiO2 and undoped TiO2 as photoanodes. The synthesis of TiO2 and Mg-TiO2 was carried out using the hydrothermal method with variations in the concentration of Mg dopant of 0, 0.5, 1, and 2% based on the molar ratio. The presenceof 2% of Mg in anatase TiO2 paste decreased the TiO2 band gap from 3.15 to 2.60 eV. Analysis results show that adding Mg dopant decreased the crystal size. Mg dopants on TiO2 could also form new energy levels, which reduced the band gap energy of TiO2. In addition, the increased concentration of Mg dopants also shifted the absorption capacity of TiO2 from the ultra-violet (UV) wavelengths region to the visible light area. The maximum energy conversion efficiency of the DSSCs with Mg-doped TiO2 photoanode of 0.5, 1, and 2% are 0.045; 0.070, and 0.172%, respectively, where these three efficiency values are higher than undoped TiO2 (0.017%). The results proved that the presence of Mg dopants on the TiO2 photoanode can increase the efficiency of DSSC.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135993728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pembuatan dan Karakterisasi BPAC (Banana Peels Activated Carbon) Sebagai Biosorben Logam Raksa (Hg) dengan Aktivator HCl 用盐酸活化剂制备用作金属汞(Hg)生物吸附剂的 BPAC(香蕉皮活性炭)及其特性分析
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.596
None Putri Ade Rahma Yulis, None Asyti Febliza
Based on the 2021 Central Statistics Agency (BPS) about environment, there is still a high level of pollution, especially pollution in water. The pollution is dominated by heavy metal contaminants. This research was carried out to make and characterized biosorbents which were activated into activated carbon from banana peel waste called BPAC (Banana Peels Activated Carbon) with HCl activator. Activated carbon has many advantages as an adsorbent with time and cost efficiency in absorbed heavy metals. Activated carbon from banana peels that has been formed was tested for its characterization included tests for water content, ash content, and iodine absorption and compared with SNI standard activated carbon quality with results of 3.9% water content, 6.2% ash content and iodine absorption 563.6 mg/g. The functional groups were tested by FT-IR (Fourier Transform-Infra Red) with the result spectrum at the peak of 3334 cm-1, 2921 cm-1, 2853 cm-1, 1575 cm-1, 1375 cm-1, and 1098 cm-1 which indicated the presence of functional groups such as (C-O); (C=O); (C-H); (O-H) of several compounds such as lignin, pectin, cellulose and galacturonic acid as active sites that can bind heavy metals such as mercury. Surface morphology of activated carbon was tested by SEM (Scanning Electron Microscopy) with 500x and 1000x magnification. Activated carbon that has been tested is then applied to artificial mercury metal waste to determine the adsorption power and effectiveness of the activated carbon. Mercury metal content before adsorption was 6.995 mg/L and after adsorption was 0.0084 mg/L which was measured used ICP-OES (Inductively Coupled Plasma – Optical Emission Spectrometry). The percentage effectiveness of BPAC (Banana Peels Activated Carbon) reaches 99.87% with an adsorption capacity of 0.698 mg/g. Based on the results of this percentage it can be said that BPAC is effective to be used as a metal mercury biosorbent.
根据2021年中央统计局(BPS)关于环境的报告,污染程度仍然很高,特别是水的污染。污染以重金属污染物为主。以香蕉皮为原料,用HCl活化剂制备了活性炭生物吸附剂BPAC (banana Peels activated carbon),并对其进行了表征。活性炭作为一种吸附剂,在吸附重金属方面具有时间和成本效益的优点。对已制得的香蕉皮活性炭进行了表征测试,包括含水量、灰分、吸碘性测试,并与SNI标准活性炭质量进行了比较,结果为含水量3.9%、灰分6.2%、吸碘563.6 mg/g。用傅里叶变换红外光谱(FT-IR)对其进行了表征,结果光谱峰为3334 cm-1、2921 cm-1、2853 cm-1、1575 cm-1、1375 cm-1和1098 cm-1,表明存在(C-O)等官能团;(C = O);(碳氢键);(O-H)的几种化合物,如木质素,果胶,纤维素和半乳糖醛酸作为活性位点,可以结合重金属,如汞。用500倍和1000倍放大的扫描电子显微镜(SEM)检测活性炭的表面形貌。然后将经过测试的活性炭应用于人造汞金属废物,以确定活性炭的吸附能力和有效性。吸附前汞含量为6.995 mg/L,吸附后汞含量为0.0084 mg/L,采用电感耦合等离子体-光学发射光谱法测定。香蕉皮活性炭(BPAC)的吸附率达到99.87%,吸附量为0.698 mg/g。根据该百分比的结果,可以说BPAC作为金属汞生物吸附剂是有效的。
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引用次数: 0
Antibacterial Activity against Gram-Positive and Gram-Negative Bacteria and Biolarvicide to Aedes aegypti from Cocok Bubu (Elatostema rostratum (Blume) Hassk) Leaves Extract 椰叶提取物对革兰氏阳性菌和革兰氏阴性菌的抑菌活性及对埃及伊蚊的杀蚊剂活性
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.613
None Lela Lilatul Khumaisah, None Rika Ayuningtias, None Salih Muharam, None Reni Mulyani, None Luthfi Awaliah
Tropical diseases are infectious diseases that commonly occur in tropical climates. Infectious diseases are caused by bacteria, viruses, parasites, and are transmitted by several vectors. There are 8 neglected tropical diseases (NTDs) that have spread in Indonesia. Therefore, massive efforts are needed to overcome this disease. Active plant substances have long been popular in treating various diseases. Cocok Bubu (Elatostema rostratum (Blume) Hassk) is an endemic plant of Indonesia. Ethnobotanical studies of this plant are used to treat fever and diarrhea. But, there are no pharmacological studies on previous research because this species belongs to a limited distribution plant. However, Elatostema has a secondary metabolite with various pharmacological activities. This study aims to determine the activity of antibacterial and biolarvicides from Cocok bubu leaf extract. The extraction using the maceration method with acetone, phytochemicals screening, toxicity test using BSLT, antibacterial test with disc diffusion to Escherichia coli, Staphylococcus aureus, Streptococcus mutant, and Streptococcus sanguinis, and biolarvicide activity against Aedes aegypti. Based on the results, Cocok bubu leaf extract contains flavonoids, alkaloids, saponin, tannin, terpenoids, and steroids with a toxicity of 758.45 ppm. From antibacterial activity results, Cocok bubu exctract had the best inhibition zone against Staphylococcus aureus (10 – 18 mm). According to the biolarvicide test, it is effective as a biolarvicide to Aedes aegypti with LC50 51.099 ppm and LT50 of 5 h 43 min. This study shows that Cocok bubu was more effective for treating and preventing NTDs in Indonesia, especially dengue and chikungunya fever in the future.
热带病是通常发生在热带气候地区的传染病。传染病是由细菌、病毒、寄生虫引起的,并通过几种媒介传播。有8种被忽视的热带病在印度尼西亚传播。因此,需要做出巨大的努力来克服这种疾病。植物活性物质长期以来被广泛用于治疗各种疾病。椰布(Elatostema rostratum (Blume) Hassk)是印度尼西亚的一种特有植物。民族植物学研究表明,这种植物被用来治疗发烧和腹泻。但由于本属有限分布植物,尚无药理研究依据。然而,Elatostema具有具有多种药理活性的次级代谢物。本研究旨在测定椰叶提取物的抑菌活性和杀虫活性。丙酮浸渍法提取、植物化学成分筛选、BSLT毒性试验、对大肠埃希菌、金黄色葡萄球菌、突变链球菌、血链球菌盘片扩散抑菌试验、对埃及伊蚊的杀虫活性。结果表明,椰叶提取物含有黄酮类化合物、生物碱、皂苷、单宁、萜类化合物和类固醇,毒性为758.45 ppm。从抑菌活性结果来看,椰子提取物对金黄色葡萄球菌的抑菌带在10 ~ 18 mm范围内。生物杀虫试验结果表明,可可布布对埃及伊蚊的LC50为51.099 ppm, LT50为5 h 43 min,具有较好的杀虫效果。本研究表明,可可布布对印度尼西亚的nntds,特别是登革热和基孔肯雅热的治疗和预防效果较好。
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引用次数: 0
The Extracted Pectin from Ambarella Fruit Peel (Spondias dulcis) as Biosorbent in Adsorption of Cu(II) Metal Ions 伞果皮中提取的果胶作为生物吸附剂对Cu(II)金属离子的吸附
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.608
Trisna Kumala Sari, Elinda Fithriana, Indang Dewata, Desy Kurniawati, Romy Dwipa Yamesa Away
Heavy metals are known to seriously injure land plants and animals, including humans, as well as marine species when present in contaminated water. For the batch adsorption technique used in this study, Cu(II) ions were removed from an aqueous solution using an inexpensive environmentally friendly adsorbent prepared from the extracted pectin of ambarella fruit peel. The functional groups of the extracted pectin were studied using Fourier Transform Infrared Spectroscopy (FT-IR). Operational conditions like pH, contact time, and initial adsorbate concentration were investigated. FTIR characterization showed that pectin was successfully extracted from ambarella fruit peel with the appearance of the peaks at 3331.36 cm-1, 2924.02 cm-1, 1727.38 cm-1, 1626.20 cm-1, 1329.31cm−1, 1232.43cm−1, 994.18 cm−1 and these peaks have similar characteristic with a commercial pectin. The maximum uptake of Cu(II) ions was obtained at a pH of 4, a contact time of 90 min, an initial metal concentration of 150 ppm. The extracted pectin has an adsorption capacity of 6.5860 mg/g for the removal of Cu(II) ions from aqueous solution under the optimum adsorption conditions. In addition, the data obtained from contacting the extracted pectin of ambarella fruit peel in Batang Arau River water showed an adsorption capacity of 0.0376 mg/g. Therefore, the pectin that was extracted from the peel of the ambarella fruit could be used to filter out Cu(II) ions from aqueous solutions.
众所周知,重金属存在于受污染的水中会严重伤害陆地植物和动物,包括人类,以及海洋物种。在本研究中使用的间歇吸附技术中,使用一种廉价的环保吸附剂从水溶液中去除Cu(II)离子,这种吸附剂是从伞叶果皮提取的果胶中制备的。利用傅里叶变换红外光谱(FT-IR)对提取的果胶的官能团进行了研究。考察了pH、接触时间、初始吸附浓度等操作条件。FTIR表征表明,从伞叶果皮中成功提取了果胶,其峰位于3331.36 cm-1、2924.02 cm-1、1727.38 cm-1、1626.20 cm-1、1329.31cm -1、1232.43cm -1、994.18 cm-1,与商品果胶具有相似的特征。在pH = 4、接触时间为90 min、初始金属浓度为150 ppm时,Cu(II)离子的吸收量最大。在最佳吸附条件下,提取的果胶对Cu(II)离子的吸附量为6.5860 mg/g。此外,在巴塘阿劳河水中接触伞果皮提取果胶的吸附量为0.0376 mg/g。因此,从伞叶果皮中提取的果胶可用于过滤水溶液中的Cu(II)离子。
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引用次数: 0
Fitokimia, Kadar Fenolik Total, dan Flavonoid Total serta Aktivitas Antioksidan Ekstrak n-Heksana Rimpang Temu Hitam (Curcuma aeruginosa Roxb) 植物化学、总酚含量、总类黄酮和总抗氧化剂活性
Pub Date : 2023-10-17 DOI: 10.25077/jrk.v14i2.599
Auliya Ilmiawati, Ika Resmeiliana, None Ishika Jauza Nasywa, None Fadia Fahira, None Nafisa Muthia Wafa, None M. Raffi Rayandhika, None Andi Thaariq Muhammad, None Arini Septianti, None Hafizah Fatunisa
The rhizome of black turmeric (Curcuma aeruginosa) is a plant rich in benefits and has been used as a herbal medicine to treat various health problems. This study aims to obtain the n-hexane extract of black turmeric rhizome and perform phytochemical tests, determine total phenolic and total flavonoid levels, as well antioxidant tests using the DPPH method. Extraction of n-hexane from black turmeric rhizome obtained yield of 4.88%, total phenolic content of 3.01 mg QE/g extract and total flavonoids of 6.31 mg QE/g extract. The phytochemical test obtained positive results for the presence of alkaloids and flavonoids; negative tannins, steroids/triterpenoids and saponins. Antioxidant tests using the DPPH method obtained the percentage of DPPH capture ranging from 76-78%, with the largest percentage value obtained when the extract concentration was 125 ppm, which was 78.02%. This shows that black turmeric n-hexane extract has weak antioxidant activity.
黑姜黄(Curcuma aeruginosa)的根茎是一种富含益处的植物,已被用作治疗各种健康问题的草药。本研究旨在获得黑姜黄根茎正己烷提取物,并采用DPPH法进行植物化学试验,测定总酚和总黄酮水平,并进行抗氧化试验。从黑姜黄根茎中提取正己烷,得率为4.88%,总酚含量为3.01 mg QE/g,总黄酮含量为6.31 mg QE/g。植物化学检测结果为生物碱和黄酮类化合物阳性;负单宁,类固醇/三萜和皂苷。采用DPPH法进行抗氧化试验,得到DPPH的捕获率为76 ~ 78%,其中提取液浓度为125 ppm时捕获率最大,为78.02%。说明黑姜黄正己烷提取物具有较弱的抗氧化活性。
{"title":"Fitokimia, Kadar Fenolik Total, dan Flavonoid Total serta Aktivitas Antioksidan Ekstrak n-Heksana Rimpang Temu Hitam (Curcuma aeruginosa Roxb)","authors":"Auliya Ilmiawati, Ika Resmeiliana, None Ishika Jauza Nasywa, None Fadia Fahira, None Nafisa Muthia Wafa, None M. Raffi Rayandhika, None Andi Thaariq Muhammad, None Arini Septianti, None Hafizah Fatunisa","doi":"10.25077/jrk.v14i2.599","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.599","url":null,"abstract":"The rhizome of black turmeric (Curcuma aeruginosa) is a plant rich in benefits and has been used as a herbal medicine to treat various health problems. This study aims to obtain the n-hexane extract of black turmeric rhizome and perform phytochemical tests, determine total phenolic and total flavonoid levels, as well antioxidant tests using the DPPH method. Extraction of n-hexane from black turmeric rhizome obtained yield of 4.88%, total phenolic content of 3.01 mg QE/g extract and total flavonoids of 6.31 mg QE/g extract. The phytochemical test obtained positive results for the presence of alkaloids and flavonoids; negative tannins, steroids/triterpenoids and saponins. Antioxidant tests using the DPPH method obtained the percentage of DPPH capture ranging from 76-78%, with the largest percentage value obtained when the extract concentration was 125 ppm, which was 78.02%. This shows that black turmeric n-hexane extract has weak antioxidant activity.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136034739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Jurnal Riset Kimia
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